"If these people show up with cameras, filming potential refugee claimants at work, those refugee claimants may very well have an increased risk to return to their country," said Cannon.

"Even if you try to tell them, 'Oh yeah, I realized after that you are a refugee claimant. Don't worry we won't broadcast that ' — you've already created fear because they were told they get to have a private process."

Privacy laws respected say producers

Both CBSA and Force Four Entertainment, the company that produces the reality TV show Border Security for Shaw Media, insist privacy laws were respected.

A statement from the CBSA also said that participation in the television series is strictly voluntary.

"I ask the guy, 'Why is there a camera?' and they say, 'No, don't worry, it's a reality show,'"—Migrant worker Oscar Mata

"An individual’s case will not be negatively or positively impacted by their decision to participate or not," the statement read.

On Thursday afternoon, Force Four Entertainment spokesman Andrew Poon issued a written statement saying no one will be identified in the programs without their written permission and even with consent, their names will not be revealed.

Poon also said that "no one is filmed without their advance verbal permission."

Union concerned about show

But Dan Robinson, a spokesman for the Customs and Immigration Union that represents the border agents, says he also has reservations about the show.

"We don't know what Force Four will choose to do in terms of actual final production. We don't know what is spliced or comments will be taken out of context and that's why we are concerned for our members," said Robinson.

This construction site in East Vancouver was raided by immigration agents on Wednesday. (Steve Lus/CBC)

One of the men detained by Canadian Border Services Agents says he was confused when he was handed a release for a reality TV show.

Oscar Mata says when he was in custody, producers asked him to sign a release so they could broadcast his image.

"I ask the guy, 'Why is there a camera?' and they say, 'No, don't worry, it's a reality show,'" said Mata.

He says the whole event was confusing, and on Thursday he was packing his bags to return to Mexico.

"I know it's the job for these guys…but I don't like the camera."

According to the show's website, Border Security: Canada’s Front Line is produced by Shaw Media in Vancouver and shadows CBSA officers working at air, land, and marine crossings in B.C.’s Lower Mainland and Vancouver Island.

The show is broadcast on the National Geographic Channel and is produced by Vancouver-based Force Four Entertainment.